/**
 * Copyright (C), 2015-2018, XXX有限公司
 * FileName: KaptchaController
 * Author:   zhouheng
 * Date:     2018/7/5 13:53
 * Description: 验证码控制类
 * History:
 * <author>          <time>          <version>          <desc>
 * 作者姓名           修改时间           版本号              描述
 */
package com.hengby.hengcrud.modular.sys.controller;

import com.google.code.kaptcha.Constants;
import com.google.code.kaptcha.Producer;
import com.hengby.hengcrud.config.properties.HengCrudProperties;
import com.hengby.hengcrud.core.util.FileUtil;
import com.hengby.hengcrud.modular.base.controller.BaseController;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;

/**
 * 〈一句话功能简述〉<br> 
 * 〈验证码控制类〉
 *
 * @author zhouheng
 * @create 2018/7/5
 * @since 1.0.0
 */
@RequestMapping("/kaptcha")
@Controller
public class KaptchaController extends BaseController{
    @Autowired
    Producer producer;
    @Autowired
    HengCrudProperties hengCrudProperties;

    @RequestMapping(value = "")
    public void index(HttpServletResponse response){

        response.setDateHeader("Expires", 0);

        // Set standard HTTP/1.1 no-cache headers.
        response.setHeader("Cache-Control", "no-store, no-cache, must-revalidate");

        // Set IE extended HTTP/1.1 no-cache headers (use addHeader).
        response.addHeader("Cache-Control", "post-check=0, pre-check=0");

        // Set standard HTTP/1.0 no-cache header.
        response.setHeader("Pragma", "no-cache");

        // return a jpeg
        response.setContentType("image/jpeg");

        // create the text for the image
        String capText = producer.createText();

        // store the text in the session
        getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
        getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, capText);

        // create the image with the text
        BufferedImage bi = producer.createImage(capText);
        ServletOutputStream out = null;
        try {
            out = response.getOutputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }

        // write the data out
        try {
            ImageIO.write(bi, "jpg", out);
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            try {
                out.flush();
            } catch (IOException e) {
                e.printStackTrace();
            }
        } finally {
            try {
                out.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @RequestMapping("/gifCode/{ramdom}")
    public void getGifCode(@PathVariable("ramdom") String ramdom,HttpServletResponse response){
        String path = hengCrudProperties.getFileUploadPath() + ramdom + ".jpg";
        try {
            byte[] bytes = FileUtil.toByteArray(path);
            String code = new String(bytes,"UTF-8");
            // store the text in the session
            getSession().removeAttribute(Constants.KAPTCHA_SESSION_KEY);
            getSession().setAttribute(Constants.KAPTCHA_SESSION_KEY, code);

            response.getOutputStream().write(bytes);
        }catch (Exception e){
            //如果找不到图片就返回一个默认图片
            try {
                response.sendRedirect("/asserts/img/girl.gif");
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
    }

}